Hi murray- I did this on my Henry J- but also went pillarless by welding tops of doors onto body. If you keep the door tops it will be easier- just strip all the stuff in the way of the window travel in the vent window area and install felt channels for the windows (J.C Whitney out of Chicago still has them) or you can get them at swap meets- at least in the states! You will have to make the channel that supports the bottom of the window longer and re-adjust the tracking- or do as me and get an electric window kit. Make a cardboard or masonite template of the new sized window without the vent window- check fit and travel- then have your glass cut. Sounds simple, but you may need to weld in a section of fabbed channel depending on how it looks after all the 'junk' is removed. It is a great look though- take it apart and see if you want to go for it!!!